In order to solve the environmental pollution problem of the traditional phosphates aluminum corrosion inhibitor, an environmentalfriendly cutting fluid was prepared, by using triethylene glycol maleate to replace the phosphates as nonferrous metal corrosion inhibitor, fine refined naphthenic oil as the base oil, and adding extreme pressure lubricant, surfactant，defoamer and biocide as additives. The comprehensive test results show that the prepared cutting fluid is a low foaming, longlife and environmentalfriendly product with excellent storage stability, extreme pressure and antiwear performances.